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Acoustic emission testing of repaired storage tank
In order to check the structural defects of a repaired storage tank, acoustic emission (AE) signals were monitored during a load sequence of 90-110% maximum operating load range. Then, based on the AE activity indications, subsequent radiographic testing (RT) was conducted. The field AE test results showed the active emissions of weld-like defects and the inordinate emission bursts of mechanical noise signals. The mechanical noise resulting from valve shut-off was characterized by the high-density emissions of high-count events compared with the genuine emissions. Some activity indications were confirmed to be correlated with significant weld-like defects by the follow-up RT, but other emissions appeared to be unrelated to any detected defects. The observed weld-like defects were a through-wall weld crack of 1.5 cm length and a round individual porosity of 0.5 cm diameter, respectively. Under the 110% maximum operating load conditions of the repaired storage tank, the detected defect emissions were active but not characteristic of defect growth.
Acoustic emission testing of repaired storage tank
In order to check the structural defects of a repaired storage tank, acoustic emission (AE) signals were monitored during a load sequence of 90-110% maximum operating load range. Then, based on the AE activity indications, subsequent radiographic testing (RT) was conducted. The field AE test results showed the active emissions of weld-like defects and the inordinate emission bursts of mechanical noise signals. The mechanical noise resulting from valve shut-off was characterized by the high-density emissions of high-count events compared with the genuine emissions. Some activity indications were confirmed to be correlated with significant weld-like defects by the follow-up RT, but other emissions appeared to be unrelated to any detected defects. The observed weld-like defects were a through-wall weld crack of 1.5 cm length and a round individual porosity of 0.5 cm diameter, respectively. Under the 110% maximum operating load conditions of the repaired storage tank, the detected defect emissions were active but not characteristic of defect growth.
Acoustic emission testing of repaired storage tank
Schallemissionsprüfung von reparierten Speichertanks
Kwon, J.R. (author) / Lyu, G.J. (author) / Lee, T.H. (author) / Kim, J.Y. (author)
International Journal of Pressure Vessels and Piping ; 78 ; 373-378
2001
6 Seiten, 12 Quellen
Article (Journal)
English
Application of acoustic emission to evaluate deteriorated and repaired concrete structures
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